CS109909-3
LEAD
Max Wortman
Period 5
CS109909-3
LEAD – 6P14
Electrons: 82 Neutrons: 125
Protons: 82 Atomic Mass: 207.2
Melting point: 327.6º C
CS109909-3
Basic Information
 Lead is a basic group element with symbol “Pb”
and atomic number 82.
 Derives from Latin w...
CS109909-3
History
 Lead has been commonly used for thousands
of years because it is widespread, easy to
extract and easy...
CS109909-3
How does lead get into the
environment?
 Deterioration of lead-based paint
 Leaded gasoline
 Lead mines or s...
CS109909-3
How are people exposed to
lead?
 Dust, paint, and/or soil
 Contaminated food, water, or alcohol
 Some import...
CS109909-3
Lead in home environments:
bare soil
porch
windows
doors
walls
tracked in
Lead in dust
• Pre-1978 homes with de...
CS109909-3
How are people exposed to lead in
work environments?
 Swallowing lead dust
 Breathing contaminated air
 Lead...
CS109909-3
What jobs involve lead?
 Lead smelting
or mining
 Construction/ remodeling
 Automobile repair
 Plumbing
 P...
CS109909-3
Lead in drinking water
 Lead can enter water by leaching from
 Lead-containing pipes
 Brass faucets
 Solder...
CS109909-3
Lead in commercial products
 Lead is still used in products such as:
 Bridge paint
 Computers
 Solder
 Cer...
CS109909-3
Lead in food products
 Food or beverages may be contaminated
through
 Production
 Packaging
 Storage
CS109909-3
Effects of lead
 No known threshold for effects of lead
 Affects all organ systems
 Developmental neurologic...
CS109909-3
FIN
CS109909-3
FIN
Max Wortman
Period 5
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LEAD PRESENTATION

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LEAD PRESENTATION

  1. 1. CS109909-3 LEAD Max Wortman Period 5
  2. 2. CS109909-3 LEAD – 6P14 Electrons: 82 Neutrons: 125 Protons: 82 Atomic Mass: 207.2 Melting point: 327.6º C
  3. 3. CS109909-3 Basic Information  Lead is a basic group element with symbol “Pb” and atomic number 82.  Derives from Latin word plumbum  Lead is a soft, malleable poor metal.  It is also counted as a heavy metal.  A soft blue-grey metal  Lead, when exposed to air, turns to a dull, gray color.  Found in a natural environment.  Labeled as a “post-transition metal”  Still used in consumer products.  Such as paint and gasoline
  4. 4. CS109909-3 History  Lead has been commonly used for thousands of years because it is widespread, easy to extract and easy to work with.  The Romans had the largest lead mining economy in history.  Lead’s symbol “Pb” is an abbreviation of its Latin name “plumbum” for soft metals.  Unfortunately, no one knows who discovered lead.  There is evidence that the first discovery of lead was 9,000 years ago.
  5. 5. CS109909-3 How does lead get into the environment?  Deterioration of lead-based paint  Leaded gasoline  Lead mines or smelters 
  6. 6. CS109909-3 How are people exposed to lead?  Dust, paint, and/or soil  Contaminated food, water, or alcohol  Some imported home remedies and cosmetics
  7. 7. CS109909-3 Lead in home environments: bare soil porch windows doors walls tracked in Lead in dust • Pre-1978 homes with deteriorated leaded paint • Children at greatest risk • Most exposure through leaded dust in home
  8. 8. CS109909-3 How are people exposed to lead in work environments?  Swallowing lead dust  Breathing contaminated air  Lead contacting skin  Workers can expose their families if they bring lead home on their clothes or skin
  9. 9. CS109909-3 What jobs involve lead?  Lead smelting or mining  Construction/ remodeling  Automobile repair  Plumbing  Police officers/military  Many others
  10. 10. CS109909-3 Lead in drinking water  Lead can enter water by leaching from  Lead-containing pipes  Brass faucets  Solder  Boiling does not get rid of lead  Running cold water before use may reduce exposure
  11. 11. CS109909-3 Lead in commercial products  Lead is still used in products such as:  Bridge paint  Computers  Solder  Ceramic glazes  Jewelry  Automotive batteries  Imported or older pre- regulation products
  12. 12. CS109909-3 Lead in food products  Food or beverages may be contaminated through  Production  Packaging  Storage
  13. 13. CS109909-3 Effects of lead  No known threshold for effects of lead  Affects all organ systems  Developmental neurologic effects  Affects fetal viability, and fetal and early childhood development  Maternal lead may affect child’s neurologic development
  14. 14. CS109909-3 FIN
  15. 15. CS109909-3 FIN Max Wortman Period 5
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